Safety appliance for woodworking machinery.



F. BRAUN.

SAFETY APPLIANOB FOR WOODWORKING MAUHINBBY.

Arruouxox Hmm JULY a, nos.

912,799. Patented Fem, 1909.

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FRANK BRAUN, OF DETROIT, MICHIGAN.

SAFETY APPLIANCE FOR WOODWORKING MACHINERY.

Specification oi Letters Patent.

Patented Feb. 16, 1909.

Application filed July 2. 1908. Serial No. 441,674.

To all 'whom it may concern:

Be it known that l, FRANK BRAUN, a citizen of the United States of America, residing at Detroit, in the county of l/Vayne and State of Michigan, have invented. certain new and useful Improvements in Safety Appliances l for Woodworking Machinery, of which the following is a s eciication, reference being had therein to tie accompanying drawings.

The invention relates generally to woodworking machines, and particularl T to planers, and consists primarily in a sa ety appliance in the nature of a guard for the rotary cutter serving to protect the hands of the operator by preventing them from coming into contact with the knives.

The invention further consists in the peculiar arrangement and combination of the parts of the safety appliance, and still further in certain details of construction as will be more fully hereinafter described.

In the drawings,-Figui-e 1 is a sectional pers ective view of a laner, with my safety app lance attached; Eig. 2 is a sectional perspective view of the appliance; and Fig. 3 is a section taken on line -:n of Fig. l.

,ln the drawings thus briefly described, the reference letter A represents the bed of an ordinary planer, having the usual transverse opening or slot B therein, in which is mounted a suitable rotary cutter E, the knives of which roject upwardly through the slot above t ie machine bed into contact with the work. Extending longitudinally of the bed and at one side thereof is a work guide or fence D, against which the work contacts dur in@ the operation of planing or smoothing.

tE represents the safety appliance, which consists of a guard member E2, arranged above the slot or opening in the bed and eX- tending in close proximity to the work guide D. In planing the sides of the board, the latter is arranged face down on the bed and pushed beneath the guard over the knives, the guard serving in addition to a safety a ,pliance or protector as a guide for the wor olding it in proper contact with the cutter knives.

F represents a curved standard attached in any suitable manner to the machine, terminating at its free end in a bearing a', through which extends a bar b adapted to be held in various positions of lateral adjustment by a suitable set-screw c. The bar in turn carries a vertical bearing d at its free end, through which extends an upright e cai'- ried by a bracket arm f bolted to the guard E2. A suitable set-screw d serves to hold the upright e in different positions of vertical adjustment. 1

From the mechanism described, it will be obvious that the guard may be raised or lowered any desired amount to'receive the work,

and may be also shifted laterally iii relation to the guide board or fence D in special instances to permit large pieces of work to pass between the guard and the guide.

ln many instances it is desirable not only to plane the sides or face portions of the boards, but also the edges, and .l have therefore provided means permitting the edging of the work to be effected without the necessity of shifting the guard laterally. The referable means for this purpose is a swinging section G, forming a part of the guard roper and arranged for movement in adjaccnce to the guide D, the swinging niember being adapted to be o erated by the work and to be moved by tlie latter out of operative position in relation to the cutter to permit the work to pass beside the guide over the cutter knives. The swinging section, as shown, is preferably in the form of a plate corresponding in width to the uard pro er, and aving at one corner s ace vertica bearings g h in alinernent, an at an adjoining corner a laterally projecting 'finger sectioni that extends over and contacts with the body of the guard during its swinging movement. The guard body is )rovided in turn with a rib and a vertical bearing k adapted to register with the bearings g 71, of the swinging section. A pivot pin Z engages the several bearings, and forms a pivotal connection between the plate and guard proper.

For the urpose of automatically returning the swinging or yielding section of the guard to its initial position after movement b the work, I provide a coil spring m encircling the pivot pin as shown and having its ends contacting respectively with the rib y' upon the guard proper and a corresponding rib 0 on the section.

It will be obvious from the foregoing description of the appliance that the guar by extending over the entire working portion of the slot, affords proper rotection to the hands of the o erator, whi e the yieldin section permits t ie edging of the work to e effected without the necessity of shifting the guard laterally to permit the assage of the work between the same and t 1e usual guide or fence. It will also be noticed that the guard serves the double function of a protection member and of a holder for the worlc, and that the swinging section performs similar functions, the plate when moved against the tension of the spring bearing against the y safety appliance is adapted for use in coni nection with various types of planing machines, the upright being constructed to support the entire iuard or safety appliance, and the standardl in turn being readily attaehable at any desired point to the machine.

What I claim as my invention is,-

1. In a Woodworking machine, the combination with a bed, of the rotary cutter projecting upwardly therethrough, and a rigid guard member for the cutter provided with a swinging section yieldable to the Work, having its path of movement in a plane parallel to the bed.

2. In a woodworking machine, the combination with a bed, of a rotary cutter extending u wardly throu h a slot Within the bed, a wor guide exten ing longitudinally of tlze bed, and a transverse guard member extending over the cutter in immediate proximity to the guide, and provided with a springpressed swinging section adjoining said guide and pivoted for :movement in a plane parallel to the bed.

3. In a woodworking machine, the combination `with a bed, of a rotary cutter projecting upwardly therethrough, a cutter guarding member for and extending over the cutter provided. with a pivoted section yieldable to the Work and having its path ol. movement in a plane parallel to the bed.

4. In a woodworking machine, the combination with a bed of a cutter projecting upward therethrough, a guide on said bed, a cutter guarding member for and extending over the cutter provided with a pivoted section adapted to yieldably press the Work against said guide.

5. In a woodworking machine, the combination with a bed, of a cutter projecting up- Ward therethrough, a guide on said bed, a cutter guarding member for and extending over the cutter provided with a spring pressed pivoted section yieldable with the Work, havin its path of movement in a plane aral-le with the bed, and `adapted to yieldaiily press the work against said guide.

6. In a Woodworking machine, the combination with a transversely slotted bed, of cutter knives arranged Within the slot and projecting u Ward beyond the bed, a Work guide exten ing longitudinally of the bed, a guard for the cutter comprising a member extending over said cutter and guarding the same, having a spring-pressed section mounted for swinging movement in a plane parallel with the lbed adapted to be operated by the Work, and an anti-friction member adapted to contact with the Workduring the passage of the latter over the cutter blades.

In testimony whereof I afiix my signature in presence of two Witnesses.

FRANK BRAUN.

Witnesses:

NELLIE K-INSELLA, JAMES P. BARRY. 

